Striver's A2Z Sheet - Learn DSA from A to Z

Last updated : December 13, 2025

This course is made for people who want to learn DSA from A to Z for free in a well-organised and structured manner.

1%

Overall Progress4/455

Easy3/128

Medium1/178

Hard0/149

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	User Input / Output	Solve			---			Easy
	Data Types	Solve			---			Easy
	If Else statements	Solve			---			Easy
	Switch Statement	Solve			---			Easy
	What are arrays, strings?	Solve			---			Easy
	For loops	Solve			---			Easy
	While loops	Solve			---			Easy
	Functions (Pass by Reference and Value)	Solve			---			Easy
	Time Complexity [Learn Basics, and then analyse in next Steps]	Solve			---			Easy

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Patterns	Solve			---			Easy

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	C++ STL	Solve			---			Medium
	Java Collections	Solve		---	---			Easy

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Count Digits	Solve			---			Easy
	Reverse a Number	Solve						Easy
	Check Palindrome	Solve						Easy
	GCD Or HCF	Solve			---			Easy
	Armstrong Numbers	Solve						Easy
	Print all Divisors	Solve			---			Easy
	Check for Prime	Solve			---			Easy

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Understand recursion by print something N times	---			---			Easy
	Print name N times using recursion	---			---			Easy
	Print 1 to N using recursion	Solve			---			Easy
	Print N to 1 using recursion	Solve			---			Easy
	Sum of first N numbers	Solve			---			Easy
	Factorial of N numbers	Solve			---			Easy
	Reverse an array	Solve			---			Easy
	Check if a string is palindrome or not	Solve						Easy
	Fibonacci Number	Solve						Easy

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Hashing Theory	Solve			---			Medium
	Counting frequencies of array elements	Solve		---	---			Easy
	Find the highest/lowest frequency element	Solve		---				Easy

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Selection Sort	Solve			---			Easy
	Bubble Sort	Solve			---			Easy
	Insertion Sort	Solve			---			Easy

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Merge Sort	Solve			---			Medium
	Recursive Bubble Sort	Solve		---	---			Easy
	Recursive Insertion Sort	Solve		---	---			Medium
	Quick Sort	Solve			---			Easy

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Largest Element in an Array	Solve			---			Easy
	Second Largest Element in an Array without sorting	Solve			---			Easy
	Check if the array is sorted	Solve						Easy
	Remove duplicates from Sorted array	Solve						Easy
	Left Rotate an array by one place	Solve						Easy
	Left rotate an array by D places	Solve						Easy
	Move Zeros to end	Solve						Easy
	Linear Search	Solve			---			Easy
	Find the Union	Solve			---			Easy
	Find missing number in an array	Solve						Easy
	Maximum Consecutive Ones	Solve						Easy
	Find the number that appears once, and other numbers twice.	Solve						Medium
	Longest subarray with given sum K(positives)	Solve			---			Medium
	Longest subarray with sum K (Positives + Negatives)	Solve			---			Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	2Sum Problem	Solve						Easy
	Sort an array of 0's 1's and 2's	Solve						Medium
	Majority Element (>n/2 times)	Solve						Easy
	Kadane's Algorithm, maximum subarray sum	Solve						Medium
	Print subarray with maximum subarray sum (extended version of above problem)	Solve			---			Medium
	Stock Buy and Sell	Solve						Medium
	Rearrange the array in alternating positive and negative items	Solve						Medium
	Next Permutation	Solve						Medium
	Leaders in an Array problem	Solve			---			Medium
	Longest Consecutive Sequence in an Array	Solve						Medium
	Set Matrix Zeros	Solve						Medium
	Rotate Matrix by 90 degrees	Solve						Medium
	Print the matrix in spiral manner	Solve						Medium
	Count subarrays with given sum	Solve						Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Pascal's Triangle	Solve						Medium
	Majority Element (n/3 times)	Solve						Hard
	3-Sum Problem	Solve						Medium
	4-Sum Problem	Solve						Medium
	Largest Subarray with 0 Sum	Solve			---			Medium
	Count number of subarrays with given xor K	Solve			---			Hard
	Merge Overlapping Subintervals	Solve						Medium
	Merge two sorted arrays without extra space	Solve						Medium
	Find the repeating and missing number	Solve			---			Hard
	Count Inversions	Solve			---			Hard
	Reverse Pairs	Solve						Hard
	Maximum Product Subarray	Solve						Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Binary Search to find X in sorted array	Solve						Easy
	Implement Lower Bound	Solve			---			Easy
	Implement Upper Bound	Solve			---			Easy
	Search Insert Position	Solve						Easy
	Floor/Ceil in Sorted Array	Solve			---			Easy
	Find the first or last occurrence of a given number in a sorted array	Solve						Easy
	Count occurrences of a number in a sorted array with duplicates	Solve			---			Easy
	Search in Rotated Sorted Array I	Solve						Medium
	Search in Rotated Sorted Array II	Solve						Medium
	Find minimum in Rotated Sorted Array	Solve						Easy
	Find out how many times has an array been rotated	Solve			---			Easy
	Single element in a Sorted Array	Solve						Medium
	Find peak element	Solve						Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Find square root of a number in log n	Solve			---			Medium
	Find the Nth root of a number using binary search	Solve			---			Medium
	Koko Eating Bananas	Solve						Medium
	Minimum days to make M bouquets	Solve						Medium
	Find the smallest Divisor	Solve						Medium
	Capacity to Ship Packages within D Days	Solve						Hard
	Kth Missing Positive Number	Solve						Easy
	Aggressive Cows	Solve			---			Hard
	Book Allocation Problem	Solve			---			Hard
	Split array - Largest Sum	Solve						Hard
	Painter's partition	Solve			---			Hard
	Minimize Max Distance to Gas Station	Solve						Hard
	Median of 2 sorted arrays	Solve						Hard
	Kth element of 2 sorted arrays	Solve			---			Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Find the row with maximum number of 1's	Solve			---			Easy
	Search in a 2 D matrix	Solve						Hard
	Search in a row and column wise sorted matrix	Solve						Hard
	Find Peak Element (2D Matrix)	Solve						Medium
	Matrix Median	Solve			---			Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Remove outermost Paranthesis	Solve	---	---				Easy
	Reverse words in a given string / Palindrome Check	Solve		---				Medium
	Largest odd number in a string	Solve		---				Easy
	Longest Common Prefix	Solve		---				Easy
	Isomorphic String	Solve		---				Easy
	check whether one string is a rotation of another	Solve		---				Easy
	Check if two strings are anagram of each other	Solve		---				Easy

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Sort Characters by frequency	Solve		---				Easy
	Maximum Nesting Depth of Paranthesis	Solve	---	---				Easy
	Roman Number to Integer and vice versa	Solve	---	---				Easy
	Implement Atoi	Solve		---				Medium
	Count Number of Substrings	---	---	---	---			Medium
	Longest Palindromic Substring[Do it without DP]	Solve	---	---				Hard
	Sum of Beauty of all substring	Solve	---	---				Medium
	Reverse Every Word in A String	Solve		---				Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Introduction to LinkedList, learn about struct, and how is node represented	Solve			---			Easy
	Inserting a node in LinkedList	Solve			---			Easy
	Deleting a node in LinkedList	Solve						Easy
	Find the length of the linkedlist [learn traversal]	Solve	---		---			Easy
	Search an element in the LL	Solve	---		---			Easy

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Introduction to DLL, learn about struct, and how is node represented	Solve			---			Easy
	Insert a node in DLL	Solve			---			Easy
	Delete a node in DLL	Solve			---			Easy
	Reverse a DLL	Solve	---		---			Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Middle of a LinkedList [TortoiseHare Method]	Solve						Easy
	Reverse a LinkedList [Iterative]	Solve						Medium
	Reverse a LL [Recursive]	Solve						Medium
	Detect a loop in LL	Solve						Medium
	Find the starting point in LL	Solve						Medium
	Length of Loop in LL	Solve			---			Medium
	Check if LL is palindrome or not	Solve						Medium
	Segrregate odd and even nodes in LL	Solve						Medium
	Remove Nth node from the back of the LL	Solve						Medium
	Delete the middle node of LL	Solve						Medium
	Sort LL	Solve						Hard
	Sort a LL of 0's 1's and 2's by changing links	Solve			---			Medium
	Find the intersection point of Y LL	Solve						Medium
	Add 1 to a number represented by LL	Solve			---			Medium
	Add 2 numbers in LL	Solve						Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Delete all occurrences of a key in DLL	Solve			---			Hard
	Find pairs with given sum in DLL	Solve	---		---			Medium
	Remove duplicates from sorted DLL	Solve			---			Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Reverse LL in group of given size K	Solve						Hard
	Rotate a LL	Solve						Hard
	Flattening of LL	Solve			---			Hard
	Clone a Linked List with random and next pointer	Solve						Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Recursive Implementation of atoi()	Solve		---				Medium
	Pow(x, n)	Solve						Easy
	Count Good numbers	Solve	---	---				Easy
	Sort a stack using recursion	Solve	---	---	---			Medium
	Reverse a stack using recursion	Solve	---	---	---			Easy

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Generate all binary strings	Solve	---	---	---			Medium
	Generate Paranthesis	Solve		---				Medium
	Print all subsequences/Power Set	Solve						Medium
	Learn All Patterns of Subsequences (Theory)	---	---		---			Medium
	Count all subsequences with sum K	Solve		---	---			Easy
	Check if there exists a subsequence with sum K	Solve		---	---			Easy
	Combination Sum	Solve						Medium
	Combination Sum-II	Solve						Medium
	Subset Sum-I	Solve			---			Medium
	Subset Sum-II	Solve						Medium
	Combination Sum - III	Solve		---				Medium
	Letter Combinations of a Phone number	Solve		---				Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Palindrome Partitioning	Solve						Hard
	Word Search	Solve		---				Hard
	N Queen	Solve						Hard
	Rat in a Maze	Solve			---			Hard
	Word Break	Solve		---				Medium
	M Coloring Problem	Solve			---			Hard
	Sudoko Solver	Solve						Hard
	Expression Add Operators	Solve	---	---				Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Introduction to Bit Manipulation [Theory]	Solve			---			Easy
	Check if the i-th bit is set or not	Solve			---			Easy
	Check if a number is odd or not	Solve			---			Easy
	Check if a number is power of 2 or not	Solve						Easy
	Count the number of set bits	Solve			---			Easy
	Set/Unset the rightmost unset bit	---	---		---			Easy
	Swap two numbers	Solve	---		---			Easy
	Divide two integers without using multiplication, division and mod operator	Solve						Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Count number of bits to be flipped to convert A to B	Solve						Medium
	Find the number that appears odd number of times	Solve						Medium
	Power Set	Solve						Medium
	Find xor of numbers from L to R	Solve			---			Medium
	Find the two numbers appearing odd number of times	Solve			---			Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Print Prime Factors of a Number	Solve			---			Hard
	All Divisors of a Number	Solve			---			Easy
	Sieve of Eratosthenes	Solve						Hard
	Find Prime Factorisation of a Number using Sieve	Solve			---			Hard
	Power(n, x)	Solve						Easy

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Implement Stack using Arrays	Solve			---			Easy
	Implement Queue using Arrays	Solve			---			Easy
	Implement Stack using Queue	Solve						Easy
	Implement Queue using Stack	Solve						Easy
	Implement stack using Linkedlist	Solve			---			Easy
	Implement queue using Linkedlist	Solve			---			Easy
	Check for balanced paranthesis	Solve						Easy
	Implement Min Stack	Solve						Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Infix to Postfix Conversion using Stack	Solve	---		---			Medium
	Prefix to Infix Conversion	Solve	---		---			Medium
	Prefix to Postfix Conversion	Solve	---		---			Medium
	Postfix to Prefix Conversion	Solve	---		---			Medium
	Postfix to Infix	Solve	---		---			Medium
	Convert Infix To Prefix Notation	Solve	---		---			Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Next Greater Element	Solve						Medium
	Next Greater Element 2	Solve						Medium
	Next Smaller Element	Solve	---	---	---			Easy
	Number of NGEs to the right	Solve	---	---	---			Easy
	Trapping Rainwater	Solve						Hard
	Sum of subarray minimum	Solve						Medium
	Asteroid Collision	Solve						Medium
	Sum of subarray ranges	Solve						Medium
	Remove k Digits	Solve						Medium
	Largest rectangle in a histogram	Solve						Hard
	Maximal Rectangles	Solve						Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Sliding Window maximum	Solve						Hard
	Stock span problem	Solve						Hard
	The Celebrity Problem	Solve						Hard
	LRU cache (IMPORTANT)	Solve						Medium
	LFU cache	Solve						Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Longest Substring Without Repeating Characters	Solve						Medium
	Max Consecutive Ones III	Solve						Medium
	Fruit Into Baskets	Solve			---			Medium
	longest repeating character replacement	Solve						Hard
	Binary subarray with sum	Solve						Hard
	Count number of nice subarrays	Solve						Hard
	Number of substring containing all three characters	Solve						Hard
	Maximum point you can obtain from cards	Solve						Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Longest Substring with At Most K Distinct Characters	Solve						Hard
	Subarray with k different integers	Solve	---					Hard
	Minimum Window Substring	Solve		---				Hard
	Minimum Window Subsequence	Solve		--- ---				Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Introduction to Priority Queues using Binary Heaps	Solve		---	---			Medium
	Min Heap and Max Heap Implementation	Solve		--- ---	---			Medium
	Check if an array represents a min-heap or not	Solve		---	---			Medium
	Convert min Heap to max Heap	Solve		--- ---	---			Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Kth largest element in an array [use priority queue]	Solve		---				Medium
	Kth smallest element in an array [use priority queue]	Solve	---	---	---			Medium
	Sort K sorted array	---	---	---	---			Easy
	Merge M sorted Lists	Solve	---	---				Hard
	Replace each array element by its corresponding rank	Solve	---	---	---			Easy
	Task Scheduler	Solve	---	---				Medium
	Hands of Straights	Solve	---	---				Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Design twitter	Solve	---	---				Medium
	Connect `n` ropes with minimal cost	Solve		---	---			Medium
	Kth largest element in a stream of running integers	Solve		---				Hard
	Maximum Sum Combination	Solve	---	---	---			Hard
	Find Median from Data Stream	Solve	---	---				Hard
	K most frequent elements	Solve	---	---				Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Assign Cookies	Solve						Easy
	Fractional Knapsack Problem	Solve	---		---			Medium
	Greedy algorithm to find minimum number of coins	Solve			---			Hard
	Lemonade Change	Solve						Easy
	Valid Paranthesis Checker	Solve						Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	N meetings in one room	Solve			---			Medium
	Jump Game	Solve						Easy
	Jump Game 2	Solve	---					Medium
	Minimum number of platforms required for a railway	Solve			---			Medium
	Job sequencing Problem	Solve			---			Medium
	Candy	Solve						Hard
	Program for Shortest Job First (or SJF) CPU Scheduling	Solve			---			Medium
	Program for Least Recently Used (LRU) Page Replacement Algorithm	Solve		---	---			Medium
	Insert Interval	Solve						Medium
	Merge Intervals	Solve	---					Medium
	Non-overlapping Intervals	Solve						Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Introduction to Trees	Solve			---			Easy
	Binary Tree Representation in C++	Solve			---			Easy
	Binary Tree Representation in Java	Solve			---			Easy
	Binary Tree Traversals in Binary Tree	Solve	---		---			Easy
	Preorder Traversal of Binary Tree	Solve						Easy
	Inorder Traversal of Binary Tree	Solve						Easy
	Post-order Traversal of Binary Tree	Solve						Easy
	Level order Traversal / Level order traversal in spiral form	Solve						Easy
	Iterative Preorder Traversal of Binary Tree	Solve						Easy
	Iterative Inorder Traversal of Binary Tree	Solve						Easy
	Post-order Traversal of Binary Tree using 2 stack	Solve						Easy
	Post-order Traversal of Binary Tree using 1 stack	Solve						Easy
	Preorder, Inorder, and Postorder Traversal in one Traversal	Solve			---			Easy

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Height of a Binary Tree	Solve						Medium
	Check if the Binary tree is height-balanced or not	Solve						Medium
	Diameter of Binary Tree	Solve						Easy
	Maximum path sum	Solve						Medium
	Check if two trees are identical or not	Solve						Medium
	Zig Zag Traversal of Binary Tree	Solve						Medium
	Boundary Traversal of Binary Tree	Solve						Medium
	Vertical Order Traversal of Binary Tree	Solve						Medium
	Top View of Binary Tree	Solve			---			Medium
	Bottom View of Binary Tree	Solve			---			Medium
	Right/Left View of Binary Tree	Solve						Medium
	Symmetric Binary Tree	Solve						Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Root to Node Path in Binary Tree	Solve			---			Medium
	LCA in Binary Tree	Solve						Hard
	Maximum width of a Binary Tree	Solve						Medium
	Check for Children Sum Property	Solve			---			Hard
	Print all the Nodes at a distance of K in a Binary Tree	Solve						Hard
	Minimum time taken to BURN the Binary Tree from a Node	Solve			---			Hard
	Count total Nodes in a COMPLETE Binary Tree	Solve						Easy
	Requirements needed to construct a Unique Binary Tree \| Theory	Solve		---	---			Medium
	Construct Binary Tree from inorder and preorder	Solve						Hard
	Construct the Binary Tree from Postorder and Inorder Traversal	Solve						Hard
	Serialize and deserialize Binary Tree	Solve						Easy
	Morris Preorder Traversal of a Binary Tree	Solve						Hard
	Morris Inorder Traversal of a Binary Tree	Solve						Hard
	Flatten Binary Tree to LinkedList	Solve						Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Introduction to Binary Search Tree	Solve			---			Easy
	Search in a Binary Search Tree	Solve						Easy
	Find Min/Max in BST	---	---	---	---			Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Ceil in a Binary Search Tree	Solve			---			Easy
	Floor in a Binary Search Tree	Solve			---			Easy
	Insert a given Node in Binary Search Tree	Solve		---				Medium
	Delete a Node in Binary Search Tree	Solve		---				Medium
	Find K-th smallest/largest element in BST	Solve						Medium
	Check if a tree is a BST or BT	Solve		---				Medium
	LCA in Binary Search Tree	Solve		---				Medium
	Construct a BST from a preorder traversal	Solve		---				Medium
	Inorder Successor/Predecessor in BST	Solve						Medium
	Merge 2 BST's	Solve						Hard
	Two Sum In BST \| Check if there exists a pair with Sum K	Solve						Hard
	Recover BST \| Correct BST with two nodes swapped	Solve		---				Hard
	Largest BST in Binary Tree	Solve		---	---			Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Graph and Types	Solve			---			Easy
	Graph Representation \| C++	Solve			---			Easy
	Graph Representation \| Java	Solve			---			Easy
	Connected Components \| Logic Explanation	Solve						Medium
	BFS	Solve			---			Medium
	DFS	Solve			---			Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Number of provinces (leetcode)	Solve						Medium
	Connected Components Problem in Matrix	Solve		---	---			Medium
	Rotten Oranges	Solve						Medium
	Flood fill	Solve						Medium
	Cycle Detection in Undirected Graph (bfs)	Solve			---			Hard
	Cycle Detection in Undirected Graph (dfs)	Solve			---			Hard
	0/1 Matrix (Bfs Problem)	Solve						Medium
	Surrounded Regions (dfs)	Solve						Medium
	Number of Enclaves [flood fill implementation - multisource]	Solve						Medium
	Word ladder - 1	Solve						Hard
	Word ladder - 2	Solve						Hard
	Number of Distinct Islands [dfs multisource]	Solve						Medium
	Bipartite Graph (DFS)	Solve						Hard
	Cycle Detection in Directed Graph (DFS)	Solve						Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Topo Sort	Solve			---			Hard
	Kahn's Algorithm	Solve			---			Hard
	Cycle Detection in Directed Graph (BFS)	Solve			---			Hard
	Course Schedule - I	Solve						Hard
	Course Schedule - II	Solve						Medium
	Find eventual safe states	Solve						Hard
	Alien dictionary	Solve						Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Shortest Path in UG with unit weights	Solve			---			Hard
	Shortest Path in DAG	Solve			---			Hard
	Djisktra's Algorithm	Solve			---			Hard
	Why priority Queue is used in Djisktra's Algorithm	Solve			---			Hard
	Shortest path in a binary maze	Solve						Hard
	Path with minimum effort	Solve						Hard
	Cheapest flights within k stops	Solve						Hard
	Network Delay time	Solve		---				Medium
	Number of ways to arrive at destination	Solve						Hard
	Minimum steps to reach end from start by performing multiplication and mod operations with array elements	Solve			---			Hard
	Bellman Ford Algorithm	Solve			---			Hard
	Floyd Warshal Algorithm	Solve			---			Hard
	Find the city with the smallest number of neighbors in a threshold distance	Solve						Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Minimum Spanning Tree	Solve			---			Hard
	Prim's Algorithm	Solve			---			Hard
	Disjoint Set [Union by Rank]	Solve			---			Hard
	Disjoint Set [Union by Size]	Solve			---			Hard
	Kruskal's Algorithm	Solve			---			Hard
	Number of operations to make network connected	Solve						Hard
	Most stones removed with same rows or columns	Solve						Medium
	Accounts merge	Solve						Hard
	Number of island II	Solve						Hard
	Making a Large Island	Solve						Hard
	Swim in rising water	Solve		---				Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Bridges in Graph	Solve						Hard
	Articulation Point	Solve			---			Hard
	Kosaraju's Algorithm	Solve			---			Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Dynamic Programming Introduction	Solve			---			Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Climbing Stars	Solve						Medium
	Frog Jump(DP-3)	Solve			---			Medium
	Frog Jump with k distances(DP-4)	Solve			---			Medium
	Maximum sum of non-adjacent elements (DP 5)	Solve						Medium
	House Robber (DP 6)	Solve						Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Ninja's Training (DP 7)	Solve			---			Medium
	Grid Unique Paths : DP on Grids (DP8)	Solve						Medium
	Grid Unique Paths 2 (DP 9)	Solve						Medium
	Minimum path sum in Grid (DP 10)	Solve						Medium
	Minimum path sum in Triangular Grid (DP 11)	Solve						Medium
	Minimum/Maximum Falling Path Sum (DP-12)	Solve						Medium
	3-d DP : Ninja and his friends (DP-13)	Solve			---			Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Subset sum equal to target (DP- 14)	Solve			---			Hard
	Partition Equal Subset Sum (DP- 15)	Solve						Hard
	Partition Set Into 2 Subsets With Min Absolute Sum Diff (DP- 16)	Solve						Hard
	Count Subsets with Sum K (DP - 17)	Solve			---			Hard
	Count Partitions with Given Difference (DP - 18)	Solve			---			Hard
	Assign Cookies	Solve						Easy
	Minimum Coins (DP - 20)	Solve						Hard
	Target Sum (DP - 21)	Solve						Medium
	Coin Change 2 (DP - 22)	Solve						Hard
	Unbounded Knapsack (DP - 23)	Solve			---			Hard
	Rod Cutting Problem \| (DP - 24)	Solve			---			Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Longest Common Subsequence \| (DP - 25)	Solve						Hard
	Print Longest Common Subsequence \| (DP - 26)	Solve			---			Hard
	Longest Common Substring \| (DP - 27)	Solve			---			Hard
	Longest Palindromic Subsequence \| (DP-28)	Solve						Hard
	Minimum insertions to make string palindrome \| DP-29	Solve						Hard
	Minimum Insertions/Deletions to Convert String \| (DP- 30)	Solve						Hard
	Shortest Common Supersequence \| (DP - 31)	Solve						Hard
	Distinct Subsequences\| (DP-32)	Solve						Hard
	Edit Distance \| (DP-33)	Solve						Hard
	Wildcard Matching \| (DP-34)	Solve						Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Best Time to Buy and Sell Stock \|(DP-35)	Solve						Medium
	Buy and Sell Stock - II\|(DP-36)	Solve						Medium
	Buy and Sell Stocks III\|(DP-37)	Solve						Medium
	Buy and Stock Sell IV \|(DP-38)	Solve						Medium
	Buy and Sell Stocks With Cooldown\|(DP-39)	Solve	---					Hard
	Buy and Sell Stocks With Transaction Fee\|(DP-40)	Solve						Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Longest Increasing Subsequence \|(DP-41)	Solve						Medium
	Printing Longest Increasing Subsequence\|(DP-42)	Solve			---			Medium
	Longest Increasing Subsequence \|(DP-43)	Solve			---			Medium
	Largest Divisible Subset\|(DP-44)	Solve						Medium
	Longest String Chain\|(DP-45)	Solve						Medium
	Longest Bitonic Subsequence \|(DP-46)	Solve			---			Medium
	Number of Longest Increasing Subsequences\|(DP-47)	Solve						Medium

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Matrix Chain Multiplication\|(DP-48)	Solve			---			Hard
	Matrix Chain Multiplication \| Bottom-Up\|(DP-49)	Solve			---			Hard
	Minimum Cost to Cut the Stick\|(DP-50)	Solve						Hard
	Burst Balloons\|(DP-51)	Solve						Hard
	Evaluate Boolean Expression to True\|(DP-52)	Solve						Hard
	Palindrome Partitioning - II\|(DP-53)	Solve						Hard
	Partition Array for Maximum Sum\|(DP-54)	Solve	---					Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Maximum Rectangle Area with all 1's\|(DP-55)	Solve						Hard
	Count Square Submatrices with All Ones\|(DP-56)	---	---					Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Implement TRIE \| INSERT \| SEARCH \| STARTSWITH	Solve						Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Implement Trie - 2 (Prefix Tree)	Solve		---	---			Hard
	Longest String with All Prefixes	Solve		---	---			Medium
	Number of Distinct Substrings in a String	Solve			---			Medium
	Bit PreRequisites for TRIE Problems	---	---	---	---			Hard
	Maximum XOR of two numbers in an array	Solve						Hard
	Maximum XOR With an Element From Array	Solve						Hard

Status	Problem	Plus	Resource Plus	Resource	Practice	Note	Revision	Difficulty
	Minimum number of bracket reversals needed to make an expression balanced	Solve		---				Hard
	Count and say	Solve		---				Hard
	Hashing In Strings \| Theory	---	---	---	---			Medium
	Rabin Karp	Solve		--- ---				Hard
	Z-Function	Solve		---				Hard
	KMP algo / LPS(pi) array	Solve		---				Hard
	Shortest Palindrome	Solve		--- ---				Hard
	Longest happy prefix	Solve		---				Hard
	Count palindromic subsequence in given string	Solve	---	---	---			Hard